Samuel bristow



duim Mw me @ma IMPROVEMENT N SAW-MILLS.

tite flgehnh: :criant tu im tlgrse ttters nirut ma making part nf tlg 5mm.

TO- ALL WHOM IT MAX CONCERN:

` Be it known that :[,SAMUEL BRISTOW, of Bedford, in the county of Lawrence, and State of Indiana, have invented a new and 'improved Log Adjuster; and I do hereby declare that the following is a full, clear, and exact description thereof. f

The object of my invention is to lessen the labor of those in attendance upon saw-mills, and the invention consists in arranging shafts, with drum and wheels on them, in such ya manner that, with a lever and pulley and rope and chains, one man may be able to handle saw-logs with oase.

And to enable others skilled' in the art to make and use my invention, I will proceed to describe its construction and operation, reference being had to `the accompanying' drawings, which form a part of this specification, and to the letters ofv reference marked thereon.

Figure 1 represents an end view; and

Figure 2, aplan or top' view.

Similarlettelrs indicate like parts.

A represents the shaft from which the machine is operated. B is a pulley which drives the shaft by a belt from the engine. C is a grooved pulley on the shaft A. D is another shaft lying' parallel with, the shaft A. E-is another grooved pulley on the shaft` D, and corresponding in position with the pulley C, so that a chain or rope lwill'work on them both. The shaft D forms a drum, D around which the draw-rope is-wound'. F is a lever, with which the chain, z, is tightened, which works on the pulleys. One end of the drum shaft D is movable by the lever.F. The post or standard which supports the bearing or journal of this end of the shaft isso arranged that thev chain can be loosened or tightened by the lever. When it is loose, the drum stops itsA motion; when it is tightened on the pulleys, the drum 4revolves with the driving shaft. Gis a sheave, suspended from the arm, H,'and over which the draw-rope runs. J is the draw-rope. It is attached to the drum D. The other end extends out from the drum and over the pulley.` Achain may be attached to the 'end of the rope, with a hook, lc, at 'the end. A chain' may be employed `altogether instead of a rope. To turn asaw-log, pass the .hook under the log, and fasten it to the side next the lever. Then tighten the chain, which causes the drum-to be revolved, and the power of the engine will do the rest. For rolling logs to the carriage, pass the hook under the middle of the log, and fasten it to one of the timbers of the-mill. Then tighten the chain as before,.and the power'wh'ich drives the mill will do the work.

By this improvementpa great rsaving of labor is effected in tending saw-mills. I do not confine myself to the manner of construction as represented in the drawing. I merely wish to show the shafts and working parte, without much reference to their relative positions when in actual "use.

Having thus' described my invention, what I claim as new, and desire to secnreby Letters Patent, is

The grooved pulley E on the drum shaft D, one end of said shaft having bearings in a movable standard,

grooved pulley C on the driving shaft A, chain L and lever F, when constructed and arranged as herein set forth.

The above specification of my invention signed by me this 24th day of September, 1866.

\ l SAMUEL BRSTOW Witnesses:

NEWTON F. MALor'r, GEsLEn M. Dmfrnnron. 

